Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh vai » hanh vi, hanh va, hanh tai
tu cach » tu cac
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
ha hoi » hoa hoi, ha noi, va hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu ve cac duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuat sach)) ky nang ((ha hoi) OR (xa hoi)). hieu ve cac duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuat sach)) ky nang ((ha hoi) or (xa hoi)). hieu ve cac duc va hanh vai cua tre*.